<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div>111</div>
    <div>222</div>
    <hr>
    <div style="color: red">牛顿</div>
    <div style="color: green;background-color: pink;">牛顿</div>
    <div style="background-color: pink;width: 100px;height: 100px;">牛顿2</div>
    <hr>
    <span style="background-color: red;width: 200px;height: 200px;">充电器</span>
    <hr>
    <button>按钮</button>
    <button style="height: 100px;width: 100px;">按钮2</button>
</body>
</html>